In theory it was possible to starve the system if
a tx/rx handler could implicitly trigger more
tx/rx pci events.
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/pci.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 95e9066..7abb836 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -823,20 +823,24 @@ static void ath10k_pci_ce_send_done(struct ath10k_ce_pipe *ce_state)
struct ath10k *ar = ce_state->ar;
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
struct ath10k_hif_cb *cb = &ar_pci->msg_callbacks_current;
- void *transfer_context;
+ struct sk_buff_head list;
+ struct sk_buff *skb;
u32 ce_data;
unsigned int nbytes;
unsigned int transfer_id;
- while (ath10k_ce_completed_send_next(ce_state, &transfer_context,
- &ce_data, &nbytes,
- &transfer_id) == 0) {
+ __skb_queue_head_init(&list);
+ while (ath10k_ce_completed_send_next(ce_state, (void **)&skb, &ce_data,
+ &nbytes, &transfer_id) == 0) {
/* no need to call tx completion for NULL pointers */
- if (transfer_context == NULL)
+ if (skb == NULL)
continue;
- cb->tx_completion(ar, transfer_context);
+ __skb_queue_tail(&list, skb);
}
+
+ while ((skb = __skb_dequeue(&list)))
+ cb->tx_completion(ar, skb);
}
/* Called by lower (CE) layer when data is received from the Target. */
@@ -847,12 +851,14 @@ static void ath10k_pci_ce_recv_data(struct ath10k_ce_pipe *ce_state)
struct ath10k_pci_pipe *pipe_info = &ar_pci->pipe_info[ce_state->id];
struct ath10k_hif_cb *cb = &ar_pci->msg_callbacks_current;
struct sk_buff *skb;
+ struct sk_buff_head list;
void *transfer_context;
u32 ce_data;
unsigned int nbytes, max_nbytes;
unsigned int transfer_id;
unsigned int flags;
+ __skb_queue_head_init(&list);
while (ath10k_ce_completed_recv_next(ce_state, &transfer_context,
&ce_data, &nbytes, &transfer_id,
&flags) == 0) {
@@ -869,7 +875,10 @@ static void ath10k_pci_ce_recv_data(struct ath10k_ce_pipe *ce_state)
}
skb_put(skb, nbytes);
+ __skb_queue_tail(&list, skb);
+ }
+ while ((skb = __skb_dequeue(&list))) {
ath10k_dbg(ar, ATH10K_DBG_PCI, "pci rx ce pipe %d len %d\n",
ce_state->id, skb->len);
ath10k_dbg_dump(ar, ATH10K_DBG_PCI_DUMP, NULL, "pci rx: ",
--
1.8.5.3
--
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